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author | Kevin | 2014-11-15 09:58:27 +0800 |
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committer | Kevin | 2014-11-15 09:58:27 +0800 |
commit | 392e8802486cb573b916e746010e141a75f507e6 (patch) | |
tree | 50029aca02c81f087b90336e670b44e510782330 /ANDROID_3.4.5/arch/x86/include/asm/rwlock.h | |
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init android origin source code
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/include/asm/rwlock.h')
-rw-r--r-- | ANDROID_3.4.5/arch/x86/include/asm/rwlock.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/arch/x86/include/asm/rwlock.h b/ANDROID_3.4.5/arch/x86/include/asm/rwlock.h new file mode 100644 index 00000000..a5370a03 --- /dev/null +++ b/ANDROID_3.4.5/arch/x86/include/asm/rwlock.h @@ -0,0 +1,49 @@ +#ifndef _ASM_X86_RWLOCK_H +#define _ASM_X86_RWLOCK_H + +#include <asm/asm.h> + +#if CONFIG_NR_CPUS <= 2048 + +#ifndef __ASSEMBLY__ +typedef union { + s32 lock; + s32 write; +} arch_rwlock_t; +#endif + +#define RW_LOCK_BIAS 0x00100000 +#define READ_LOCK_SIZE(insn) __ASM_FORM(insn##l) +#define READ_LOCK_ATOMIC(n) atomic_##n +#define WRITE_LOCK_ADD(n) __ASM_FORM_COMMA(addl n) +#define WRITE_LOCK_SUB(n) __ASM_FORM_COMMA(subl n) +#define WRITE_LOCK_CMP RW_LOCK_BIAS + +#else /* CONFIG_NR_CPUS > 2048 */ + +#include <linux/const.h> + +#ifndef __ASSEMBLY__ +typedef union { + s64 lock; + struct { + u32 read; + s32 write; + }; +} arch_rwlock_t; +#endif + +#define RW_LOCK_BIAS (_AC(1,L) << 32) +#define READ_LOCK_SIZE(insn) __ASM_FORM(insn##q) +#define READ_LOCK_ATOMIC(n) atomic64_##n +#define WRITE_LOCK_ADD(n) __ASM_FORM(incl) +#define WRITE_LOCK_SUB(n) __ASM_FORM(decl) +#define WRITE_LOCK_CMP 1 + +#endif /* CONFIG_NR_CPUS */ + +#define __ARCH_RW_LOCK_UNLOCKED { RW_LOCK_BIAS } + +/* Actual code is in asm/spinlock.h or in arch/x86/lib/rwlock.S */ + +#endif /* _ASM_X86_RWLOCK_H */ |